Digestible isoleucine-to-lysine ratio effects in diets for broilers from 4 to 6 weeks posthatch

Mejía, Luis Fernando; Zumwalt, C. D.; Kim, E.J.; Tillman, P. B.; Corzo, A.

doi:10.3382/japr.2010-00273

Cited by 17 publications

(15 citation statements)

References 10 publications

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“…The average crude protein intake in the experimental period (13.45 g) was lower than the 16.00 g recommended by the Hy-Line W36 Commercial Management Guide (Hy-Line International, 2009-2011. However, the egg mass was similar to that recommended by the guide, indicating that reduction of crude protein in diets and supplementation of amino acids provides satisfactory egg production.…”

Section: Resultsmentioning

confidence: 73%

“…It has been verified that the concentration of lysine in plasma can decrease with increase of dietary isoleucine concentration (Peganova & Eder, 2003). It is suggested that excess dietary isoleucine may affect fertility of broiler breeders (Ekmay et al, 2013) and that the digestible isoleucine:lysine ratio affects feed conversion and breast meat yield in broilers (Mejia et al, 2011). The studies on isoleucine requirement for broilers have been reviewed; however, there are limited recent studies assessing isoleucine requirements and isoleucine: lysine ratio for laying hens in the egg-laying phase.…”

Section: Introductionmentioning

confidence: 96%

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Ideal digestible isoleucine: digestible lysine ratio in diets for laying hens aged 24-40 weeks

et al. 2013

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-Two hundred fifty-two Hy-Line W36 laying hens were allotted in a randomized block design with 6 treatments, 7 replicates and 6 hens per experimental unit in order to determine the ideal digestible isoleucine:digestible lysine (Ile:Lys) ratio for laying hens aged 24-40 weeks. Experimental diets contained 5. 92, 6.33, 6.73, 7.14, 7.54 and 7.95 g/kg of digestible isoleucine, resulting in different Ile:Lys ratios (0.73:1, 0.78:1, 0.83:1, 0.88:1, 0.93:1 and 0.98:1). Experimental diets were isonitrogenous, with different dietary contents of glutamic acid, and made isocaloric by adjusting the levels of cornstarch. All essential amino acids were provided proportionally to digestible lysine. Feed intake, egg production, egg weight, egg mass, feed conversion ratio per egg mass, feed conversion ratio per dozen eggs, albumen, yolk and eggshell content were assessed. Feed intake, egg production, egg mass and feed conversion ratio were influenced by Ile:Lys ratios quadratically. The egg weight was not affected by Ile:Lys ratio. No differences were observed in the egg quality according to Ile:Lys ratios. The data indicates that the optimum digestible isoleucine:digestible lysine ratio for laying hens aged 24-40 week is 0.84:1, corresponding to the consumption of 681 mg of isoleucine and 811 mg of lysine/hen day −1 .

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Section: Resultsmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 96%

Ideal digestible isoleucine: digestible lysine ratio in diets for laying hens aged 24-40 weeks

et al. 2013

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“…The deficiency of SLAA resulted in significantly lower absolute intake of valine and isoleucine (in T 2 ) and additionally tryptophan (in T 3 ; Table-6 ) which perhaps impeded protein accretion and hence the growth performance of broilers, since AA have been revealed to influence the myogenic gene expression in broilers [ 16 ]. The growth retardation as a consequence to SLAA deficiency is well noticed in previous studies with deficiencies of valine alone in young broilers [ 17 , 18 ], valine and isoleucine [ 1 , 19 ], isoleucine, tryptophan and arginine [ 20 ], isoleucine alone [ 21 , 22 ] and arginine, valine, isoleucine and tryptophan [ 23 ]. With marginal SLAA deficiency in the finisher phase, birds could compensate to the SLAA intake at this time period (data not shown) and as a consequence, birds could grow on par with control which is suggestive of the compensatory growth during this period due to moderate but not for high SLAA deficiency.…”

Section: Discussionmentioning

confidence: 72%

Impact of second line limiting amino acids’ deficiency in broilers fed low protein diets with rapeseed meal and de-oiled rice bran

Kumar¹,

Gloridoss²,

Singh³

et al. 2015

Vet World

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Aim:To study the impact of deficiency of second line limiting amino acids (SLAA; valine, isoleucine and tryptophan) on the production performance and carcass characteristics of commercial broilers.Materials and Methods:A control (T1) corn-soy diet was formulated to contain all essential AA on standardized ileal digestible basis; While in T2-a ‘moderate SLAA deficit’ diet was formulated by replacement of soybean meal with 6% rapeseed meal and T3-a ‘high SLAA deficit’ diet was formulated by replacement of soybean meal with 6% de-oiled rice bran. Each of these treatments was allotted to six replicates of ten chicks each. During the 42 days experimental period, growth performance, carcass parameters and intake of metabolizable energy (ME), crude protein (CP) and AA were studied.Results:The cumulative body weight gain, feed conversion ratio, carcass cut weights and yields of carcass, breast and thighs were decreased (p<0.05) in T3 compared to T1. The absolute intake of ME, lysine, methionine + cysteine and threonine were not affected while intake of CP and all SLAA were reduced in SLAA deficit diets. The relative intake of ME, lysine, methionine + cysteine, threonine and SLAA reduced in T3 in comparison to T1. The relative weights of internal organs were not affected by treatments while the abdominal fat percentage was increased linearly to the magnitude of SLAA deficiency.Conclusion:The deficiency of SLAA decreased performance, carcass yields and impaired utilization of ME, CP and AA linearly to the magnitude of the deficiency.

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“…Furthermore the significance of interaction of papain crude extract and feed forms for feed conversion ratio (FCR) throughout the observation affirmed the role of crude papain application levels up to 0.07% in diets. Several previous researchers observed the role of supplementation of protease in the diet (Vieira et al, 2013) resulted a better feed intake (Mahejabin et al, 2015), body weight and FCR values to the chicken (Kame et al, 2015).This condition facilitated digestibility of amino acids in the diets to get a better FCR of broilers (Mejia et al, 2011). Similar response was reported by Yadav and Sah (2006)the use of 0.07% and 0.1 % acid protease in diets improved the feed efficiency of layer chicken, while Rada et al(2013)was divergent showed that the exogenous mono-component protease added into low protein broiler diet had no significant effect on both observed growth parameters carcass characteristic.…”

Section: Resultsmentioning

confidence: 93%

The effects of Papain Crude Extract Addition in Diets on Broilers Production Performances

Rumokoy

Pudjihastuti

Untu

et al. 2016

JAP

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This study was conducted to evaluate the effects of papain crude extract addition in mash and pellet feed forms on production performance of broiler chickens in order to obtain the best level of extract papain in mash or pellet form. This natural protease enzyme was extracted from unripe papaya. A complete random design was applied in this study and it was arranged with factorial 4*2 and three replications. The treatments were 4 levels of papain (0, 0.03, 0.05, and 0.07 %) and two physical forms of feed (mash and pellet). Broilers production parameters measured were: feed intake, body weight, feed conversion ratio (FCR) and carcass percentage. The results of analysis of variance showed that the interaction was highly significant (P<0.01) for feed intake, body weight, carcass percentage respectively while feed conversions have significant interaction (P<0.05). The significant differences in the feed consumption described the role of papain enzyme through treatment of CEP and the physical form of feed. The results indicate that the all treatment of papain crude extract level both in mash and pellet feed form were able to improve feed intake, body weight, FCR and carcass percentage of broiler chickens, whereas the best performance was obtained in the treatment of 0.05% papain crude extract in mash form of diets. Key words: papain, FCR, carcass, mash, pelletAbstrak. Penelitian ini dilakukan untuk mengetahui lebih dalam efek penambahan ekstrak kasar papain dalam pakan berbentuk mash dan pellet terhadap penampilan produksi broiler. Enzim protease alami ini diekstrak dari pepaya muda. Rancangan acak lengkap diterapkan dalam penelitian ini yang disusun secara faktorial 4 * 2 dan tiga ulangan. Perlakuan yang diberikan adalah 4 tingkatan papain (0, 0,03, 0,05, dan 0,07%) dan dua bentuk fisik pakan (mash dan pelet). Parameter poduksi broiler yang diukur adalah konsumsi pakan, berat badan, rasio konversi pakan (FCR) dan persentase karkas. Hasil analisis varians menunjukkan ada interaksi yang sangat signifikan (P<0,01) menyangkut konsumsi pakan, berat badan dan persentase karkas masing-masing, sementara konversi pakan menunjukkan interaksi yang nyata (P<0,05). Perbedaan yang signifikan dalam konsumsi pakan menggambarkan peran enzim papain melalui perlakuan CEP dan bentuk fisik pakan. Hasil menunjukkan bahwa semua perlakuan tingkat ekstrak kasar papain baik di mash dan pakan pelet bentuk mampu meningkatkan konsumsi pakan, berat badan, FCR dan persentase karkas ayam broiler, sedangkan performan terbaik diperoleh pada perlakuan 0,05% papain ekstrak kasar dalam pakan berbentuk mash.

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Digestible isoleucine-to-lysine ratio effects in diets for broilers from 4 to 6 weeks posthatch

Cited by 17 publications

References 10 publications

Ideal digestible isoleucine: digestible lysine ratio in diets for laying hens aged 24-40 weeks

Ideal digestible isoleucine: digestible lysine ratio in diets for laying hens aged 24-40 weeks

Impact of second line limiting amino acids’ deficiency in broilers fed low protein diets with rapeseed meal and de-oiled rice bran

The effects of Papain Crude Extract Addition in Diets on Broilers Production Performances

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